Valve, creators of best-selling game franchises (such as Half-Life and Counter-Strike) and leading technologies (such as Steam and Source), today announced the second annual holiday-themed “Australian Christmas” update, featuring two retro-futuristic “Dr. Grordbort” class packs for the Engineer and Pyro, designed by Weta Workshop’s Greg Broadmore.

In addition to the class packs, the update will also ship 14 new holiday-themed weapons, hats and cosmetic items by the TF community’s item creators, using the Steam Workshop. “CP_Foundry,” a new five-cap control point map designed by Valve’s TF2 team, comes with 12 map-specific achievements.

As part of the holiday celebration, over 50 items in the Mann Co. in-game store will be on sale for up to 75% until January 2nd, 2012. Additionally, the in-game item drop rate will be doubled for the first week of the event.

Team Fortress 2 is a free-to-play team-based first-person shooter that PC Gamer called “the most fun you can have online.” With a growing community of players and item-creators, TF2 is more popular now than ever. For more information visit http://www.teamfortress.com/australianchristmas2011. For more information on Dr. Grordborts visit http://www.drgrordborts.com.